Improvement in fastenings for chamber-doors



UNITED STATES PATENT OFFICE.

JOHN I. FRAZER, OF NEW YORK, N. Y.

.IMPROVEMENT iN FASTENINGS FOR CHAMBER-DOORS.

clare that the following is a full. clear, and ex act description of the construction and oper` ation of the same, reference being had to the annexed drawings, in which- Figure'l is a perspective; Fig. 2, a View of the bolt-catch withtlie fastener iu the place intended for the spring-bolt; and Fig. 3, the door closed, having the device attached.

I construct my fastener A, of brass, iron, or any other metal, about two inches long and three-fourths inch wide,with a support or hub on one end to act as a hook and on the other end a projection for a screw to pass through, with an opening down the center for the key. I then make a screw, B, the whole length to tighten the key in its place. I also make thel key C about two inches long by three-eighths inch wide, with one straight edge,which is iutended for doors with mortise-locks, (when the housing is finished with the Wood-work,) and on the reverse I take a piece out of the center to niake it t the housing or lock-plate of boxlocks, as in D. In inserting the fastener the screw must be drawn nearly its full length and the hook placed in the housing of either the spring or lock bolt. Then close the door, insert the key, and tighten with the screw, when the door will be effectually closed against any attempt from the outside, care being taken to adapt the key to the arrangement of the housing.

What I claim, and' desire to secure by Letters Patent, is-

The adaptation of the hook-screw and key for the uses and purposes herein set forth.

JOHN P. FRAZER.

Vitnesses:`

D. R. RAE,

SYLVEsTER LAY. 

